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• PHP-FFMPeg Converts Video Twice

  12 février 2020, par 127-0-0-1

  I'm using FFMpeg's library for PHP (see https://github.com/PHP-FFMpeg/PHP-FFMpeg). After starting the convert process, the converted video's file size gradually increases (I constantly refresh the folder) and after converting finishes, the file size becomes 0 again and converting starts again. So converting is done twice, I could not understand if it is normal or there is something wrong.

  My converting code is:

  require 'vendor/autoload.php';
  $ffmpeg = FFMpeg\FFMpeg::create([
          'ffmpeg.binaries'  => 'C:/ffmpeg/ffmpeg.exe', 
          'ffprobe.binaries' => 'C:/ffmpeg/ffprobe.exe',
          'timeout'          => 0 
      ]);
  
  $video = $ffmpeg->open($fileName);
  $video
      ->filters()
      ->resize(new FFMpeg\Coordinate\Dimension(1920, 1080 ))
      ->synchronize();
  
  $format = new FFMpeg\Format\Video\X264('libmp3lame');
  
  try {
      $video->save($format, $outFileName);
  } catch (Exception $e) {
      echo $e->getMessage();
  }
  

• how do surface blur to a video using FFMPEG common line ?

  12 février 2020, par zuiluo

  

  like above two image , it is one frame of the video ，

  origin video:https://youtu.be/Qmoc7VyX2f8

  surface blur video:https://youtu.be/zbw1XVXjn4c

  Is there a way to use FFMPEG common line do that , thank you very much

• Combine two ffmpeg commands (segment and still photo)

  11 février 2020, par Brbcod1

  is it possible to combine this command

  ffmpeg -i video.mp4 -map 0:s:0? -c copy -movflags empty_moov+default_base_moof+frag_keyframe -f segment output%03d.mp4
  

  with a command that can take a still from the first segment

  ffmpeg -ss 00:00:00.00 -i output001.mp4 -vframes 1 -q:v 2 still.jpg"
  

• How can I limit the CPU usage of moviepy ?

  11 février 2020, par Egon Kirchof

  Python 3. I am using moviepy to create a new video. The problem is ffmpeg uses 100% of all my cores so I can't do anything else in the computer. There is a parameter for write_videofile called threads but when I adjust it to, say, threads=10 (I have 12 cores in total) there is no difference. I even tried invoking the script using cpulimit (cpulimit -l 70 python my_script.py, for instance) but then the script simply doesn't work, it just freezes, no error message. Is there a way I can force moviepy not to use all the cores in the CPU or is there any application (like cpulimit) that would actually work ?

• How to add multiple audio files at specific times, on a silence audio file using ffmpeg ?

  11 février 2020, par boblapointe

  I need to overlay audio files at specific times, on an existing silence.mp3. Something like that:

  [----[...audio1...]----------[...audio2...]---------------]
  

  I've tried the following but it doesn't work:

  ffmpeg -y -i silence.mp3 -itsoffset 4 -i audio1.mp3 -itsoffset 30 -i audio2.mp3 -c:a copy final.mp3
  

  Any help would be appriciated. Thank you.